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As a result of the Cold War and with the expansion of a North American continental air defense system, Resolution Island was selected as a site for a United States Air Force (USAF) radar station, one of the many that would make up the Pinetree Line of Ground-Control Intercept (GCI) radar sites.

As a GCI base, the 920th's role was to guide interceptor aircraft toward unidentified intruders picked up on the unit's radar scopes. These interceptors were assigned to the 64th Air Division at Goose AFB, Labrador. In 1957, with the inactivation of NEAC, the station came under the jurisdiction of Air Defense Command.

Routine operations from the station were performed until 1 November 1961, when the station was inactivated and turned over to the Royal Canadian Air Force, which closed the facility.

The Canadian Coast Guard operated a radio station from 1929(?) until 1975 under the call sign VAW. The station (MF Marine) was then moved to Killinek (NWT/Nunavut), on the south shore of the Hudson Strait.

•1918 Cape Sable DF station opens

•1929 Resolution Island Radio opens

•US Navy Radio Navigational Aids 1943 lists this as a DF stn at Resolution Island, also broadcasting navigational warnings on 500 kHz.

The Canadian cargo ship named "MINNA" was wrecked on the east side of the island, on 18 August 1974. The vessel was then under charter by the Bedford Institute of Oceanography and was doing scientific surveys at the time of the accident. Badly damaged, the crew and scientific equipment's were removed. Bad weather swept the vessel in deeper waters where she sank on October 2nd 1974. This vessel with a length of 275 feet's and displacement of 4280 tons was based in Halifax and was on regular charter with the BIO for hydrographic surveys on the Labrador Coast and Hudson Strait. The MINNA was built in 1962 and had a crew of 21 men + 18 scientists.

The site was re-activated by the Canadian Forces as an unmanned North Warning System radar site in 1991. Most of the original buildings remain, mixed with new radar towers.

Winkler, David F. & Webster, Julie L., Searching the Skies, The Legacy of the United States Cold War Defense Radar Program, [2] US Army Construction Engineering Research Laboratories, Champaign, IL (1997).